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97 kx125 crank

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im really worried my crank bearings are going bad, since the bike is about 11 years old and i dout they have been replaced, what exactly am i looking for when looking at the crank? the cylinder is off atm. how can i measure it or test it?

if they are bad, do i need any special tools like a press to get the crank out of the case? i think the bearings under the connecting rod are bad but im not completely sure.

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All of your answers are here in this forum. You just have to search for it. Ed (no1clyde) made a couple great posts concerning bottom ends. Check those out as well.

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you guys thing it would be cheaper to get a rod bearing? or a compete kit.

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i do, but idk what the max limit is on the movement.

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took a while but i found the service limit, which is .70mm. mines only @ .55, and the up and down problem is solved. it wasnt the crank moving up and down it was the piston moving back and forth . i just wasnt looking good. just waiting on that stud bolt not,

went to fastenal, talked to the guy and the single helicoil install took is $150. and a kit is $55. how gay. but ill see what i can do. dads off on paid vacation all next week and im sure we can get something done. :thumbsup:

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were good to go guys! the helicoil i got previously was to big, and i bought a kit with the right size. and BAM a new cylinder =]

runs good, doing break in when it cools down outside.

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crap!!! just when i decide to look to help someone. i find a problem i know all about. then its already solved :ride: but glad you fixed it:thumbsup:

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